Siemens SENTRON 3VA1032-4ED32-0HH0 — 32 A MCCB with TM210 release
The Siemens 3VA1032-4ED32-0HH0 is a 3-pole molded case circuit breaker from the SENTRON family, rated at 32 A continuous current (Iu) with a TM210 thermal-magnetic overcurrent release. It is designed for line protection in distribution panels and motor branch circuits, delivering an interrupting capacity of 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that give it strong selectivity headroom against downstream breakers in a 400 V industrial panel. The thermal-magnetic release holds the full 32 A up to 50 °C; above that the continuous current derates to 30.72 A at 55 °C and 28.8 A at 70 °C, so a panel builder running the breaker near its limit in a warm enclosure should account for the derating curve.
Selectivity and coordination
The 121 kA at 240 V and 75.6 kA at 415 V interrupting ratings mean this breaker can sit at the service entrance or as a main feeder in a panel fed by a transformer with high fault current, without needing an upstream current-limiting fuse. The TM210 release is fixed thermal-magnetic — no electronic trip unit, no adjustable long-time or short-time pickup. That makes coordination with downstream breakers a matter of checking the time-current curve overlap; for a 32 A feeder protecting a panel of 16 A or 20 A branch breakers, the 3VA1032-4ED32-0HH0 typically provides full selectivity up to its instantaneous threshold. The rated insulation voltage of 800 V covers 690 V systems, and the interrupting rating at 690 V drops to 11.9 kA — still adequate for most 690 V motor drives with limited fault current.
Panel integration and mounting
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a compact footprint for a 32 A MCCB with 121 kA interrupting capacity. It mounts on a DIN rail or can be screw-fixed to a backplate. The front face carries IP40 protection, so it is suited for indoor panel installation where no water spray is expected. The integrated auxiliary contact block provides two auxiliary switches plus one trip alarm switch (HQ version), giving the PLC or BMS a dedicated signal for fault status without an add-on module. A shunt trip release (STL) is built in, with the auxiliary trip coil order code 3VA9688-0BL30 for remote tripping applications. No undervoltage release, no ground-fault monitoring, and no communication function are included — this is a basic line-protection breaker, not a metering or smart breaker.